Safety hoisting-hook.



E. W. PURVES. SAFETY HOISTING HOOK.

APPLIoATIoH FILED :um: 2a, 1910.

Patented Dec. 5, 1,911.

EDWARD W. PURVES, 0F CHICAGO, ILLINOIS.

SAFETY HOISTINGr-I-IOOK.

Specification of Letters Patent.

Application filed June 28, 1910.

Patented Dec. 5, 1911.

Serial No. 569,346.

To all whom it may concern.'

Be it known that I, EDWARD W. PURVES,

a citizen of the United States, residing at Chicago, in the county of Cook and State -5 of Illinois, have invented new and useful Improvements in Safety Hoisting-I-Iooks, of which the following is a specification.

This invention relates Vto improvements in hoisting hooks, and the object of the invention is to provide a hook of this class which is of an extremely simple construction, cheap to manufacture, and which will handle articles to be raised or lowered by means of a rope or chain attached to a block and tackle or the like with perfect safety.

With the above and other objects in view, which will appear as 'the description progresses, the invention resides in the novel 0 construction and combination of parts hereinafter fully describedV and claimed.

In the accompanying drawings there has been illustrated a simple and preferred embodiment of the improvement, and in which drawings, l

Figure 1 is a perspective view of the hook constructed in accordance with the present invention. Fig. 2 is a side elevation of the same parts being shown in section.

In the accompanying drawings the numeral 1 designates the hook proper. This hook comprises a main body or shank portion 2 having its lower end rounded to provide a hook 4, and its upper extremity offset rearwardly to provide a pair of spaced guide arms 5. The arms in the present instance have their outer extremities connected through the medium of a roller bearing 6, but it is obvious that the odset portion of the body need not be bifurcated to provide the arms 5 but could be provided with a central opening for the reception of a sliding member hereinafter to be set forth. The arms 5 each have their under faces provided with a V-shaped incision or recess 7, while the extremity of the hook 4 is provided with a mouth or V-shaped recess or seat 8.

The numeral 9 designates the locking iinger of the device. This locking finger or bar 9 has its outer extremity or edge beveled and adapted to be received within the n pocket 8 of the hook 4. The locking finger 5" or bar 9 is adapted to project through an opening or slot 10 which is provided at the juncture of the hook andthe body proper.

The numeral 11 designates the pintle which connects the locking finger or bar with the body of the hook l.

The outer extremity of the finger or bar- 9 is provided with a central opening, the latter adapted to coincide with similar openings provided within the bifurcated arms of the vertical slidable member or bar 12. These openings are adapted for the reception of a suitable pintle13- The slidable member 12 is movable between the bifurcated arms 5 and contacts with the roller bearing 6. The extremity of the said member 12 is provided with an eye 14, while the sides of the said body positioned below the arms 5 are transversely enlarged in opposite directions and the said transverse members are provided with V-shaped stops 15, the same adapted to be received within the recesses 7 of the arms 5 when the member 12 is swung upwardly so as to engage its finger or bar 9 within the pocket or cut away portion 8 of the hook 4. The V-shape stops 15 serve to relieve the roller 6 of any excessive lateral strain, and thereby tend to securely hold the slidable bar 12 in its supporting position. y

From the above description, taken in connection with the accompanying drawings, it will be noted that the greatest amount of strain, when the .hook 4 is supporting a bundle, is delivered between the offset arms 5 and the enlarged tooth 15 of the member 12 so that the member 12 normally supports the bundle and at the same time effectively retains the finger or arm 9 in engagement with the pocket of the member 4. It will be further noted that by providing the member 12 with the stops 15 and the arms 5 with the depressions 7 accidental longitudinal movement of the said member is entirely prevented.

II/Ihen the eye 14 is secured to a supporting cable and the hook is suspended with a load thereon, the guide arms 5 will be moved against the stops 15 and the locking bar will be tilted into a locking position against the outer end or side of the hook, and the weightof the load will tend to hold it in this position. The bar 9 is so arranged that it will not j am the rope or cable of the load on the hook and will not bite into the cable Ol rope to mutilate it.y Y

Having thus fully described the invention, what I claim as new is l. In a hook of the class set forth, a body member having its upper extremity pro vided with offset arms and its lower member rounded to provide a hook, a member having means for attachment to a rope and slidably mounted between the offset arms of the body, means for retaining the member between the said arms, the said sliding member being provided with enlargements adapted to engage the under faces of both offset arms, and a locking bar pivotally connected with the sliding member and with the hook and adapted to contact the ex tremity of the hook.

2. In a device for the purpose set forth, a body member having its lower end provided with a hook proper, said hook having its extremity provided with a recess, the upper extremity of the member being provided with ofsetffarms, a roller bearing between the arms, a sliding member working` between the arms and contacting the roller bearing and provided with means for attachment to a rope, the lower faces of the arms being provided with V-shaped recesses, the sliding member having enlargements provided with V-shaped extensions adapted to engage the recesses of the arms, and a locking bar pivotally connected with the sliding member and adapted to normally engage the recess of the hook.

3. A hoisting hook comprising a shank having a hoo-k on one end and lateral guide arms on the other, a locking bar pivoted to the shank to engage the terminal of the hook, and a bar adapted for connection to a rope and slidable between the arms and pivoted to th-e locking bar to move said locking bar against the terminal of the hook.

4:. A hoisting hook comprising a shank having a hook on one end and lateral arms on the other, a locking bar pivoted medially of its ends to the shank and adapted to engage the terminal of the hook to close the throat of the same, a bar adapted for connection to a rope and slidable between the arms and pivoted at its lower end to the locking bar and a stop for the slidable bar carried thereby.

5. In a hoisting hook, a shank having a hook on its lower end and a guide on its upper end, a locking bar pivoted to the shank and adapted to engage the terminal of thehook and bridge the throat of said hook and means pivotally connected with the locking bar and movable on the guide of the shank and adapted to be connected to a rope.

6. In a hoisting hook, a shank having a hook on its lower end and lateral guide arms on its upper end, a locking bar pivoted medial of its ends to said shank and adapted to bridge the throat of the hook and engage the terminal of said hook, means adapt` ed to be connected with a rope and pivotally connect-ed with the locking bar and movable between the guide arms and means carried by said last means for limiting the movement thereof against said guide arms.

7. In a hoisting hook, a shank having a hook on its lower end and lateral guide arms on its upper end, means movable on the shank and adapted to bridge the throat of the hook and engage the terminal thereof, a bar adapted to be connected to a rope and pivoted at its lower end to said means and slidable between the guide arms and means carried by the bar adapted to abut against the guide arms and limit the upward movement of said bar between the guide arms.

In 'testimony whereof I aiix my signature in presence of two witnesses.

EDWARD W. PURVES.

Witnesses:

AUGUST F. MUELLER, THOMAS CLYNE.

Copies of this patent may be obtained for ve cents each, by addressing the Commissioner of Patents, Washington, D. C. 

